NullSync is a free desktop tool that diagnoses why a modded Paradox multiplayer game won't connect. It compares two players' mod setups and tells you exactly what's different (missing mods, load order, altered files, version mismatch), including mods that "look installed" in the launcher but silently failed to load.
New in this release
NullSync now works with the Paradox multiplayer games, not just Stellaris. Pick your game in the Fingerprint tab:
- Stellaris
- Crusader Kings III
- Hearts of Iron IV
- Europa Universalis IV
- Victoria 3
- Imperator: Rome
Everyone in a sync room must be on the same game. Also fixed a false "update available" notice that could show even when you were already up to date.
NullSync Premium - for crews that play together a lot
The app is free forever, Crash Analyzer included. The free app is great for a one-off "why won't we connect" check between two people.
Premium is a web dashboard at sync.nullcorestudio.com that solves the ongoing version of that problem for a whole group, so you stop re-checking by hand before every session:
- Crew rooms - one page showing who in your group is out of sync, before you start a game
- Crew modlist - one click to match the host's exact setup, no more "which mod is different"
- Ready check - confirm the whole crew is good to go before you launch
- Campaign lock - freeze your modlist for a save and get warned if a mod update could break it mid-campaign (no more nuked 40-hour runs)
- Version-watch + Discord alerts - a ping in your server the moment a mod your crew uses updates and would desync you
- Fix-it plans - not just what differs, but exactly what each person should change to match
One person pays, the whole crew plays
Only the host needs Premium. Everyone else joins their rooms for free. So one organizer covers the whole group.
Price: from $3/month on Patreon. Subscribe at patreon.com/nunniebunnie, then connect your Patreon at sync.nullcorestudio.com. That's it.
Downloads
- Windows: NullSync-Setup-2.1.6.exe
- Linux: NullSync-linux-x64-2.1.6.tar.gz (extract, then run
chmod +x NullSyncbefore first launch)